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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_ancs_c/ancs_tx_buffer.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/ble_ancs_c/ancs_tx_buffer.h
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+/**
+ * Copyright (c) 2012 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#ifndef ANCS_TX_BUFFER_H__
+#define ANCS_TX_BUFFER_H__
+
+#include "nrf_ble_ancs_c.h"
+
+/** @file
+ *
+ * @addtogroup ble_ancs_c
+ * @{
+ */
+
+#define TX_BUFFER_MASK                   0x07                     //!< TX buffer mask. Must be a mask of contiguous zeroes followed by a contiguous sequence of ones: 000...111.
+#define TX_BUFFER_SIZE                   (TX_BUFFER_MASK + 1)     //!< Size of the send buffer, which is 1 bigger than the mask.
+#define WRITE_MESSAGE_LENGTH             20                       //!< Length of the write message for the CCCD/control point.
+
+/**@brief ANCS request types.
+ */
+typedef enum
+{
+    READ_REQ = 1,  /**< Type identifying that this TX message is a read request. */
+    WRITE_REQ      /**< Type identifying that this TX message is a write request. */
+} tx_request_t;
+
+
+/**@brief Structure for writing a message to the central, thus the Control Point or CCCD.
+ */
+typedef struct
+{
+  uint8_t                  gattc_value[WRITE_MESSAGE_LENGTH]; //!< The message to write.
+  ble_gattc_write_params_t gattc_params;                      //!< GATTC parameters for this message.
+} write_params_t;
+
+
+/**@brief Data to be transmitted to the connected master.
+ */
+typedef struct
+{
+  uint16_t          conn_handle;  //!< Connection handle to be used when transmitting this message.
+  tx_request_t type;         //!< Type of this message (read or write message).
+    union
+    {
+      uint16_t       read_handle;    //!< Read request message.
+      write_params_t write_req; //!< Write request message.
+    } req;
+} tx_message_t;
+
+/**@brief Function for clearing the TX buffer.
+ *
+ * @details Always call this function before using the TX buffer.
+*/
+void tx_buffer_init(void);
+
+/**@brief Function for moving the pointer of the ring buffer to the next element.
+*/
+void tx_buffer_insert(tx_message_t * p_msg);
+
+/**@brief Function for passing any pending request from the buffer to the stack.
+*/
+void tx_buffer_process(void);
+
+/** @} */
+
+#endif // ANCS_TX_BUFFER_H__
+